Value Collection 111001PR Set Screw 4-40 X 1/8 in Grade 8

Product Description

The VALUE COLLECTION 111001PR is a Grade 8 alloy steel set screw with a knurled cup point, sized 4-40 x 1/8 inch overall length. Set screws of this type are used to secure a component — such as a collar, gear, or pulley — onto a shaft without a protruding head. The hex drive (0.050 inch key size) accepts a standard hex key for installation and removal. The knurled cup point bites into the mating surface to resist rotation and axial movement under load. This fastener meets ASME/ANSI B18.3 and ASTM F912 standards, confirming dimensional and mechanical compliance for industrial and trade applications. Machinists, millwrights, and maintenance technicians are the primary installers.

This set screw is suited for light-duty shaft-retention tasks in mechanical assemblies where a flush or recessed fastener is required. The 4-40 UNC thread is common in small mechanical components, instrumentation, and light-duty HVAC and electrical equipment. The 1/8 inch overall length keeps the fastener compact for use in tight assemblies. Applications include securing shaft collars, timing pulleys, encoder wheels, and similar precision components in residential and commercial mechanical systems.

Key Features

• Grade 8 alloy steel construction for high tensile and torsional strength in a small fastener
• Knurled cup point provides positive grip on shaft surface to resist loosening under vibration
• Hex drive accepts a 0.050 inch hex key for precise torque application in confined spaces
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and mechanical standards
• 4-40 UNC thread is widely compatible with standard tapped holes in light mechanical assemblies
• Minimum order quantity of 100 pieces supports batch maintenance and production use

Compatibility

Designed as a standard 4-40 UNC set screw for use in any tapped hole conforming to ASME/ANSI B18.3 specifications requiring a knurled cup point, 1/8 inch length fastener.

Installation Notes

Installation is performed by machinists or maintenance technicians using a 0.050 inch hex key. Ensure the mating shaft or component is clean and free of debris before seating the knurled cup point. De-energize or lock out any equipment before working on rotating assemblies per applicable LOTO procedures. Do not exceed the recommended seating torque for the 4-40 thread class to avoid stripping the tapped hole.